40195321 has 2 divisors, whose sum is σ = 40195322. Its totient is φ = 40195320.

The previous prime is 40195307. The next prime is 40195349. The reversal of 40195321 is 12359104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36735721 + 3459600 = 6061^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 40195321 - 2¹¹ = 40193273 is a prime.

It is equal to p_2444812 and since 40195321 and 2444812 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40195921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20097660 + 20097661.

It is an arithmetic number, because the mean of its divisors is an integer number (20097661).

Almost surely, 2^40195321 is an apocalyptic number.

It is an amenable number.

40195321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40195321 is an equidigital number, since it uses as much as digits as its factorization.

40195321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 40195321 is about 6339.9779968072. The cubic root of 40195321 is about 342.5509427484.

The spelling of 40195321 in words is "forty million, one hundred ninety-five thousand, three hundred twenty-one".